Update dependencies to work with new layer media type

glide.yaml

@@ -1,7 +1,7 @@
 package: github.com/opencontainers/image-tools
 import:
 - package: github.com/opencontainers/image-spec
-  version: 7e6e2f76d6a11cdcb3f3e334e3f12179a0f37dad
+  version: 7a6820ed62065744e9142ec93da4b37cc86fed5a
   subpackages:
   - schema
   - specs-go/v1

image/config.go

@@ -116,6 +116,7 @@ func (c *config) runtimeSpec(rootfs string) (*specs.Spec, error) {
 	swap := uint64(c.Config.MemorySwap)
 	shares := uint64(c.Config.CPUShares)
 
+	s.Linux = new(specs.Linux)
 	s.Linux.Resources = &specs.Resources{
 		CPU: &specs.CPU{
 			Shares: &shares,

image/image_test.go

@@ -103,7 +103,7 @@ var (
     "layers": [
         {
             "digest": "<layer_digest>",
-            "mediaType": "application/vnd.oci.image.layer.tar+gzip",
+            "mediaType": "application/vnd.oci.image.layer.v1.tar+gzip",
             "size": <layer_size>
         }
     ],

image/manifest_test.go

@@ -108,7 +108,7 @@ func TestUnpackLayer(t *testing.T) {
 
 	testManifest := manifest{
 		Layers: []descriptor{descriptor{
-			MediaType: "application/vnd.oci.image.layer.tar+gzip",
+			MediaType: "application/vnd.oci.image.layer.v1.tar+gzip",
 			Digest:    fmt.Sprintf("sha256:%s", fmt.Sprintf("%x", h.Sum(nil))),
 		}},
 	}
@@ -169,7 +169,7 @@ func TestUnpackLayerRemovePartialyUnpackedFile(t *testing.T) {
 
 	testManifest := manifest{
 		Layers: []descriptor{descriptor{
-			MediaType: "application/vnd.oci.image.layer.tar+gzip",
+			MediaType: "application/vnd.oci.image.layer.v1.tar+gzip",
 			Digest:    fmt.Sprintf("sha256:%s", fmt.Sprintf("%x", h.Sum(nil))),
 		}},
 	}